A frequency-domain numerical method for noise radiation from ducted fans

Y. Özyörük; E. Alpman; V. Ahuja; L. N. Long

A frequency-domain numerical method for noise radiation from ducted fans

Y. Özyörük, E. Alpman, V. Ahuja, L. N. Long

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This paper describes a frequency domain numerical method for predicting noise radiation from ducted fans, including acoustic treatment and nonuniform background flow effects. The method solves the Euler equations linearized about a mean flow in the frequency domain. A pseudo-time derivative term is added to the frequency domain equations so that a time marching technique can be employed to drive the acoustic field to steady state explicitly. This approach makes distributed parallel computing more viable for equations of this type and allows use of well known convergence acceleration techniques, such as multigrid, to obtain the solutions efficiently. Simulations of the JT15D and a generic engine are shown at various operating conditions with comparison to results from time domain studies and available experimental data.

Original language	English (US)
Title of host publication	8th AIAA/CEAS Aeroacoustics Conference and Exhibit
State	Published - Dec 1 2002
Event	8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002 - Breckenridge, CO, United States Duration: Jun 17 2002 → Jun 19 2002

Publication series

Name	8th AIAA/CEAS Aeroacoustics Conference and Exhibit

Other

Other	8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002
Country/Territory	United States
City	Breckenridge, CO
Period	6/17/02 → 6/19/02

All Science Journal Classification (ASJC) codes

Aerospace Engineering
Electrical and Electronic Engineering
Mechanical Engineering
Acoustics and Ultrasonics

Cite this

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title = "A frequency-domain numerical method for noise radiation from ducted fans",

abstract = "This paper describes a frequency domain numerical method for predicting noise radiation from ducted fans, including acoustic treatment and nonuniform background flow effects. The method solves the Euler equations linearized about a mean flow in the frequency domain. A pseudo-time derivative term is added to the frequency domain equations so that a time marching technique can be employed to drive the acoustic field to steady state explicitly. This approach makes distributed parallel computing more viable for equations of this type and allows use of well known convergence acceleration techniques, such as multigrid, to obtain the solutions efficiently. Simulations of the JT15D and a generic engine are shown at various operating conditions with comparison to results from time domain studies and available experimental data.",

author = "Y. {\"O}zy{\"o}r{\"u}k and E. Alpman and V. Ahuja and Long, {L. N.}",

year = "2002",

month = dec,

day = "1",

language = "English (US)",

isbn = "9781624101199",

series = "8th AIAA/CEAS Aeroacoustics Conference and Exhibit",

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note = "8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002 ; Conference date: 17-06-2002 Through 19-06-2002",

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TY - GEN

T1 - A frequency-domain numerical method for noise radiation from ducted fans

AU - Özyörük, Y.

AU - Alpman, E.

AU - Ahuja, V.

AU - Long, L. N.

PY - 2002/12/1

Y1 - 2002/12/1

N2 - This paper describes a frequency domain numerical method for predicting noise radiation from ducted fans, including acoustic treatment and nonuniform background flow effects. The method solves the Euler equations linearized about a mean flow in the frequency domain. A pseudo-time derivative term is added to the frequency domain equations so that a time marching technique can be employed to drive the acoustic field to steady state explicitly. This approach makes distributed parallel computing more viable for equations of this type and allows use of well known convergence acceleration techniques, such as multigrid, to obtain the solutions efficiently. Simulations of the JT15D and a generic engine are shown at various operating conditions with comparison to results from time domain studies and available experimental data.

AB - This paper describes a frequency domain numerical method for predicting noise radiation from ducted fans, including acoustic treatment and nonuniform background flow effects. The method solves the Euler equations linearized about a mean flow in the frequency domain. A pseudo-time derivative term is added to the frequency domain equations so that a time marching technique can be employed to drive the acoustic field to steady state explicitly. This approach makes distributed parallel computing more viable for equations of this type and allows use of well known convergence acceleration techniques, such as multigrid, to obtain the solutions efficiently. Simulations of the JT15D and a generic engine are shown at various operating conditions with comparison to results from time domain studies and available experimental data.

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M3 - Conference contribution

SN - 9781624101199

T3 - 8th AIAA/CEAS Aeroacoustics Conference and Exhibit

BT - 8th AIAA/CEAS Aeroacoustics Conference and Exhibit

T2 - 8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002

Y2 - 17 June 2002 through 19 June 2002

ER -

A frequency-domain numerical method for noise radiation from ducted fans

Abstract

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All Science Journal Classification (ASJC) codes

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